Drainage tube



Dec. 29, 1953 o. w. SCHMIDT ETAL 9 I DRAINAGE TUBE Filed Sept. 22, 19472 Sheets-Sheet 1' INVENTORZS,

Dec. 29, 1953 o. w. SCHMIDT E'AL 2,663,997

DRAINAGE TUBE Filed Sept. 22, 1947 2 Sheets-Sheet 2 Patented Dec. 29,1953 DRAINAGE TUBE Otto w. Schmidt, Kansas City, Kans., and

William C. Martin, Wooster, Ohio Application September 22, 1947, SerialNo. 775,486

4 Claims.

This invention relates to new and useful improvements in drainage tubes,and has for its principal object the provision of a speciallyconstructed drainage tube having inlet openings protected in such amanner as to prevent the entry of sand or silt to said tube whileadmitting liquid thereto.

Another object is the provision of-a drainage tube formed to presentpassageways for the entry of fluid, the outer ends of said passagewaysbeing disposed below the inner ends thereof, lhgreby necessitating thatfluid rise to enter said Another object is the provision of a drainagetube having inlet ports formed adjacent the upper portion thereof, andbeing formed to present members overhanging and extending below saidinlet ports.

Still another object is the provision of a drainage tube comprising achannel and a cover member extending outwardly beyond the edges of saidchannel and forming passageways in combination with said channel throughwhich fluid must rise to enter said tube.

Other objects are simplicity and economy of construction, andadaptability of the parts when disassembled to be nested compactly foreconomical storage and shipping.

With these objects in view, as well as other objects which will appearin the course of the specification, reference will be had to thedrawings, wherein:

Figure 1 is a vertical section adjacent the curb of a street, showing astreet drainage system employing a drainage tube embodying the presentinvention.

- resilient engagement of the parts.

Fig. 2 is a plan view of a drainage tube embodying the presentinvention.

Fig. 3 is a fragmentary section taken on line III-III of Fig. 2.

Fig. 4 is an enlarged transverse section taken on line IV-IV of Fig. 2.

Fig. 5 is an enlarged transverse section taken Fig. 10 is a transverseanother modified form of the tube wherein the channel and cover portionsare joined by the Fig. 11 is an inverted plan view or" the tube shown inFig. 10.

Like reference numerals apply to similar parts throughout the severalviews, and the numeral It refers to a drainage tube comprising a channell8 of anydesired cross-section, the edges of said channels being bent toform outwardly and downwardly extending flanges 20, and a transverselycorrugated cover member 22 having its edge portions turned downwardly sothat the bottom edges of the corrugations lie against flanges 20, and sothat the under valleys 24 thereof form passageways 26 in combinationwith said flanges It will be noted that cover members 22 extendoutwardly past the outer edges of flanges '20, thus providing anoverhangprotecting the outer ends of passageways 26 and preventing thedirect packing of earth or sand in said openings.

Cover members 22 are preferably laterally arched as shown in Figs. 4 and5 for greater strength.

As is seen in Figs. 6 and '7, channels l8 and cover members 22, whendisassembled, may be compactly nested for economical use of space inshipping and storage. In assembly, tabs 23 struck from flanges 20 atspaced intervals therealong, said tabs being left in the flat duringstorage, are projected through cover member 22 and bent overv to securesaid cover member clampingly to said flanges. It is contemplated thatsections of said tubing shall be butted together and secured againstrelative movement by the following means; The cover member 22 is spacedapart from the ends of channel 13 asshown in Fig. 3, so that when thechannels are in abutted relation as shown, the ends of the adjacentcover members will be spaced apart. A two-piece band connector 56comprises a U-shaped member 32 having outturned ears 34 and adapted tooverlap the joint between the channels with the cars 34 resting againstthe flanges 20, and a corrugated strip 36 adapted to overlap adjacentcover members and to extend across the space .therebetween. Thecorrugations of stripSt are adapted to register with correspondingcorrugations of cover members 22, so that when screws 38 are inserted tojoin the end portions of strip 35 and U-shaped member 32, as shown inFig. 7, the abutted tubes will be rigidly retained in aligned relation.

As is plainly shown in Figs. 4 and 5, when the tube is buried the outeror inlet ends of passageways 26 are disposed below the inner ends, and

cross-sectional view of consequently fluid must rise through saidpassageways. Since the velocity of flow through said passageways isordinarily low, sand, dirt, silt, etc. entrained in the fluid is allowedto settle out and only relatively clean fluid is allowed to enter thetube. In ordinary drainage tubes without inlets so disposed, sand andsilt enter the tube ireely, and a comparatively short time the tub'enfiafy become so full as to be virtually useless. Thus the usefulness ofthe tube is greatly increased.

One application of the drainage tube is illustrated in Fig. 1, showing atransverse cross section at the curb line of a street 1}, trench 4a isdug along the curb line, a drai age meets laid along the bottom thereof,and the trench filled with loosely packed material 4!; such as sand,gravel, or the like. The curbing ii is supported on said sand thefooting 44 til-steer being narrower than the trench. The paving has Itis spaces ai art fro'inthe curbing at is topermit water draining 'fro'inthe slab to flow into the sand 4]; Water draining through soil betweenthe curbing and sidewall; 51? also enters the sand. The water then flowsthrough thesandbygravity, enters tube it as previously described; and isconducted thereby to any point si 'Inthe meningeal-iii Shawn in Figs. 3andil, the drainagetube 52 is erm-ea of a single sheet oi metal; theopposite edgesthereof being bent tqieiiri abutting flanges 54 joined byany suitable means such as by ivets 58; I Said tube is form t pre enenem t id v i extending nstants opposite upper e es. a p lurality'ofhoies star io'i ined through the inner rape or safe lip s adjacent thejuncture of saw. lips w t the chahnel portion s? ar the tube. regeneates ubs n lli id n al s e of the tram-e ema water being required torise from the lowerjedges of lips 58 to the level W ioreentering thetube. Holes 55 are s'p in l n r i c.

tithe modiiiedform'shhwn in Eigs; l0 and 11, th'e drainage tube'ffiii iscomprised of a channel 63 havingjoutwardlyturned flanges 68 along itsand. is: mmbl r 1... hav n ues i neste 2 isims dia s t t' edg t we fl nssifi a i e g provided W ie -WI E 'dly extendin flanges it spa eu a artfrom ni channel, Fl s a are provided with a in rtyer izasgi dmpa yss eeeapa t m ss it. featured in t e previously descr be for s,

T4 to the level er hues is before "it may enter and must rise nem therower edges flanges 6 member all portions on a transverse line of whichslope downwardly from the center line thereof and having depending sideportions secured in at at reguiar mar-vars snag the lengthspace'drelation to said flanges whereby openings to said channel areformed between said cover member and said flanges, said openings slopingupwardly to enter said channel.

2. A drainage tube comprising a sheet metal channel having outwardly anddownwardly extending flanges at its upper edges, and a continuouslytransversely arched cover member having continuous transversecorrugations secured to said flanges to form upwardly sloping tubularopenings to said channel, said cover member extending outwardly anddownwardly 1 beyond the edges of said flanges to form an overhangprotecting the entrances to said openings.

3. A drainage tube comprising a sheet metal channel having outwardly anddownwardly turned fiangesat its upper edges, and a cover a membercontinuously convex from edge to edge and having continuous transversecorrugations secured to said flanges; said cover member and flangesbeing spaced apart at intervals to pro"- vide upwardly sloping tubularopenings to said channel.

4. A drainage tube comprising a sheet metal channel having outwardly anddownwardly turned flanges at its upper edges, and a transverselycorrugated cover member formed continuously convexly from edge to edgesecured to said flanges thereby to form upwardly sloping tubularpassageways to said channels, said cover extending outwardly anddownwardly beyond the outer edges of said flanges to form an overhangprotecting the outer entrances of said passage-- ways.

o'r'ro W. SCHMIDT.

WILLIAM C. MARTIN.

Refre'iie Cited iii the file or this patent UNITED era-res PATENI'SNumber Name Date 2,153,790 Car-swell Apr. 11, 1939 2,259,335 CarswellOct. 14, 1941 2,433,300 Shafer Dec. 23, 1947

